黑毛石斛（中国高等植物图鉴）
Dendrobium williamsonii Day et Rchb. f. in Gard. Chron.: 78. 1869; Hook. f., Fl. Brit. Ind. 5: 721. 1890, et in Ann. Bot. Gard. Calcutta 5: 6, pl. 9. 1895, et in Bot. Mag. 130: t. 7974. 1904; Kraenzl. in Engler, Pflanzenr. 45 (IV. 50, II. B. 12): 92. 1910; 中国高等植物图鉴 5: 703. 图8223. 1976; Z. H. Tsi in Acta Phytotax. Sin. 18 (4): 437. 1980; Seidenf. in Opera Bot. 83: 121, fig. 77. 1985; Averyanov, Vasc. Pl. Syn. Vietnam. Fl. 1: 83. 1990; Seidenf., l. c. 114: 217, fig. 138. 1992; Averyanov, Iden. Guide Vietnam. Orch.: 182. 1994; Z. H. Tsi, S. C. Chen et K. Mori, Wild Orch. China: 87, pl. 11. 1997.
Epiphyticontreetrunksinforests;ca.1000m.NGuangxi,Hainan(WuzhiShan),SEandWYunnan[NEIndia,Myanmar,Vietnam].
本种近似于翅萼石斛 Dendrobium cariniferum Rchb. f., 区别在于本种的花瓣与萼片几乎等宽，萼片在背面的中肋不明显隆起，子房不为三棱形。 |
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Stemscylindric,sometimesswollenandfusiform,to20cm,4-6mmindiam.,unbranched,withseveralnodes,internodes2-3cm,goldenyellowwhendry |
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Leavesseveral,usuallyalternateonupperpartofstem,oblong,7-9.5×1-2cm,leathery,withdenseblackrigidhairsespeciallyonsheaths,basedecurrentformingclaspingsheaths,apexobtuseandunequallybilobed. |
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Inflorescencessubterminal,1-or2-flowered;peduncle5-10mm;basalsheaths3or4,short;floralbractsovate,ca.5mm,papery,acute;ovarynotcarinate.Flowersspreading;sepalsandpetalspaleyelloworwhite,lippaleyelloworwhite,disktingedwithtangerine.Dorsalsepalnarrowlyovate-oblong,25-34×6-9(ormore)mm,narrowlykeeledabaxially,5-veined,acuminate;lateralsepalssimilartodorsalsepalbutobliqueatbase,5-veined;mentumrigid,straight,15-20mm,formingspur.Petalssimilartosepals;lipca.2.5cm,3-lobed;laterallobesembracingcolumn,subobovate,frontmarginslightlyundulate;mid-lobesuborbicularorbroadlyelliptic,marginundulate,apexacute;disksparselyshortlyfimbriatealongveins.Columnca.6mm;anthercapbroadlyconic,frontmargindenselyshortlybarbate.。 |
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